<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0120-3347</journal-id>
<journal-title><![CDATA[Colombian Journal of Anestesiology]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. colomb. anestesiol.]]></abbrev-journal-title>
<issn>0120-3347</issn>
<publisher>
<publisher-name><![CDATA[SCARE-Sociedad Colombiana de Anestesiología y Reanimación]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-33472018000200103</article-id>
<article-id pub-id-type="doi">10.1097/cj9.0000000000000021</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Incidence of postoperative hyponatremia in neurosurgical patients in a hospital in Southern Colombia]]></article-title>
<article-title xml:lang="es"><![CDATA[Incidencia de hiponatremia postoperatoria en pacientes neuroquirúrgicos en un hospital del sur colombiano]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rocha-Rivera]]></surname>
<given-names><![CDATA[Hector Fabio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Javela-Rugeles]]></surname>
<given-names><![CDATA[Julian David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrios-Torres]]></surname>
<given-names><![CDATA[Juan Camilo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montalvo-Arce]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tovar-Cardozo]]></surname>
<given-names><![CDATA[Jesús Hernán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tejada-Perdomo]]></surname>
<given-names><![CDATA[Jorman Harvey]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Surcolombiana Health School ]]></institution>
<addr-line><![CDATA[Neiva ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>46</volume>
<numero>2</numero>
<fpage>103</fpage>
<lpage>111</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-33472018000200103&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-33472018000200103&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-33472018000200103&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Hyponatremia is the most frequently encountered electrolyte disorder in hospitalized patients, and its incidence is even greater when a neurological condition is present. A significant association has been found between hyponatremia and increases in mortality rates.  Objective: To describe the incidence of hyponatremia in neurosurgical patients of a university hospital in southern Colombia.  Methods: Descriptive, observational study that analyzed the medical records of adult patients admitted to the intensive care unit after having undergone a neurosurgical procedure in the period between 2014 and 2015. Perioperative characteristics and neurological outcomes were compared, central trend and scatter were calculated, and statistical confidence tests were applied.  Results: A total of 79 patients were included in the study. The median age was 40 years and 73.4% were male. The most frequent diagnosis was head injury, followed by space-occupying lesion and non-traumatic subarachnoid hemorrhage. The incidence of hyponatremia was 25.3%; patients with a diagnosis of subarachnoid hemorrhage were 8 times more likely to have hyponatremia (odds ratio 8.0, 95% confidence interval: 1.777-36.018). Mortality for the group of patients presenting hyponatremia was 35%, and unfavorable neurological outcomes were present in 80%.  Conclusions: Neurosurgical patients with a diagnosis of subarachnoid hemorrhage or space-occupying lesion associated with hyponatremia have a less favorable neurologic outcome, without circumstantially affecting mortality.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: La hiponatremia es el trastorno electrolítico más frecuentemente encontrado en los pacientes hospitalizados y su incidencia es aún mayor cuando se padece alguna afección neurológica. Se ha vinculado en forma significativa con incremento en las tasas de mortalidad.  Objetivo: Describir la incidencia de la hiponatremia en los pacientes neuroquirúrgicos de un hospital universitario en el sur de Colombia.  Métodos: Estudio descriptivo observacional, se analizaron las historias clínicas de pacientes adultos, que ingresaron a la unidad de cuidados intensivos después de haberles realizado algún procedimiento neuroquirúrgico en el periodo comprendido entre 2014 - 2015. Se compararon las características perioperatorias y los desenlaces neurológicos, se calcularon medidas de tendencia central y dispersión, se aplicaron pruebas de confianza estadística.  Resultados: En total 79 pacientes fueron incluidos en el estudio. La mediana para la edad fue 40 años y 73,4% fueron del género masculino. El diagnóstico más frecuente fue trauma craneoencefálico, seguido por lesión ocupante de espacio y por hemorragia subaracnoidea no traumática. La incidencia de hiponatremia fue del 25,3%; los pacientes con diagnóstico de hemorragia subaracnoidea presentaron 8 veces más probabilidad de hiponatremia (odds ratio 8,0; IC95%: 1,777-36,018). La mortalidad para el grupo de paciente que presentó hiponatremia fue del 35% y los resultados neurológicos desfavorable se presentaron en un 80%.  Conclusiones: Los pacientes que fueron intervenidos neuroquirúrgicamente con diagnóstico de hemorragia subaracnoidea o lesión ocupante de espacio asociados a hiponatremia suponen un desenlace neurológico más desfavorable, sin incidir circunstancialmente en la mortalidad.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Hyponatremia]]></kwd>
<kwd lng="en"><![CDATA[Brain Injuries Traumatic]]></kwd>
<kwd lng="en"><![CDATA[Subarachnoid Hemorrhage]]></kwd>
<kwd lng="en"><![CDATA[Anesthesia]]></kwd>
<kwd lng="en"><![CDATA[Neurosurgery]]></kwd>
<kwd lng="es"><![CDATA[Hiponatremia]]></kwd>
<kwd lng="es"><![CDATA[Lesiones Traumáticas del Encéfalo]]></kwd>
<kwd lng="es"><![CDATA[Hemorragia Subaracnoidea]]></kwd>
<kwd lng="es"><![CDATA[Anestesia]]></kwd>
<kwd lng="es"><![CDATA[Neurocirugía]]></kwd>
</kwd-group>
</article-meta>
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